Seongsan Ilchulbong Peak rose from under the sea in a volcanic eruption over 100,000 years ago. Also known as Sunrise peak is new 7 wonders of nature. Located on the eastern end of Jejudo Island, there is a huge crater at
the top of Seongsan Ilchulbong Peak. The crater is about 600m in
diameter and 90m high. With the 99 sharp rocks surrounding the crater,
it looks like a gigantic crown. While the southeast and north sides are
cliffs, the northwest side is a verdant grassy hill that is connected to
the Seongsan Village. (source)

Seongsan Ilchulbong from the air (source)The Center is the Volcanic crater of Seongsan Ilchulbong

From main entrance nak sampai ke puncak Seongsan Ilchulbong ni bukan lah semudah yang disangkakan. Kena lah merasa azab naik tangga yang agak steep sikit. Eventho, aku dah biasa hiking tapi aku tak berapa nak suka part naik tangga ni. Sebab aku rasa penat dia lain macam sikit compare to normal hiking trail yang steep. Anyway, the trail heading to top is well marked and well maintained, so, don't worry. Alhamdulillah, I took about 40 minutes to walk up which is not that bad considering a few stops along the trail. Trekking from the main entrance to the top will take you approximately, 30min to 1 hour but still depends on individual stamina too.